BlackHole weaponry 450 upper

Details

I have a 17.5" BHW upper built by Ritch Johnson. Has less than 50rds fired. Comes with the Bolt head only, 60+ hand loads of 275TSX, Hornady dies, 2 mags and a couple boxes of factory ammo. Looking for other guns as trade6mm or bigger or $650 shippedOnly pictures I have on my phone